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originally posted by: collietta
originally posted by: spirit_horse
a reply to: TrueAmerican
Hey TA, just a shot in the dark, but the old YS VS Calderas appear to have moved west from the source of the hot spot. Could the same have happened with the Long Valley caldera and the quakes further east could be from the hot spot that originally fed the LV Caldera?
I recall reading about the magma plume under the YS system possibly being all the way to the Oregon/Washington volcanic systems. Could we see new volcanoes develop east of the source that created the LV system? I know a section of Rocky Mountain chain approximately 80 miles subsided into the earth a long time ago associated with a Yellowstone eruption. Just wondering what your opinion on the matter was?
Yellowstone is not a fault. It's a hot spot, like an open wound in the Earth. It was once west, it created Idaho's Snake River valley, but it moves due to continental drift.
The Cascades and Sierra mountain ranges along with their volcanoes are created by two plates colliding and causing uplift of crust (creates mountains and quakes) and friction from the two plates grinding (creating magma).
It is possible that the Juan de Fuca and North American plate could be creating magma that feeds Yellowstone, but I thought that the hypothesis wasn't confirmed.
originally posted by: thudpuddy
Whatever it is has me scratching my head and I wonder if it could have something to do with the quakes.